Partial-wave microscopic spectroscopy detects subwavelength refractive index fluctuations: an application to cancer diagnosis
Optics Letters, Vol. 34, Issue 4, pp. 518-520 (2009)
http://dx.doi.org/10.1364/OL.34.000518
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Abstract
Existing optical imaging techniques offer us powerful tools to directly visualize the cellular structure at the microscale; however, their capability of nanoscale sensitivity is restricted by the diffraction-limited resolution. We show that the mesoscopic light transport theory analysis of the spectra of partial waves propagating within a weakly disordered medium, such as biological cells [i.e., partial wave spectroscopy (PWS)] quantifies refractive index fluctuations at subdiffractional length scales. We validate this nanoscale sensitivity of PWS using experiments with nanostructured models. We also demonstrate the potential of this technique to detect nanoscale alterations in cells from patients with pancreatic cancer who are otherwise classified as normal by conventional microscopic histopathology.
© 2009 Optical Society of America
OCIS Codes
(290.1350) Scattering : Backscattering
(300.6550) Spectroscopy : Spectroscopy, visible
ToC Category:
Spectroscopy
History
Original Manuscript: October 3, 2008
Revised Manuscript: December 12, 2008
Manuscript Accepted: December 15, 2008
Published: February 12, 2009
Virtual Issues
Vol. 4, Iss. 4 Virtual Journal for Biomedical Optics
Citation
Hariharan Subramanian, Prabhakar Pradhan, Yang Liu, Ilker R. Capoglu, Jeremy D. Rogers, Hemant K. Roy, Randall E. Brand, and Vadim Backman, "Partial-wave microscopic spectroscopy detects subwavelength refractive index fluctuations: an application to cancer diagnosis," Opt. Lett. 34, 518-520 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-34-4-518
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